Table 1.

Socio-demographic characterization of the sample.

Characteristics		Total n = 270	(%)
Age (mean ± SD)		24.7 ± 3.9
Nationality n (%)	Portuguese	245	90.7
	Other	13	5.1
	Unknown	12	4.4
Marital status n (%)	Single	196	72.6
	Other	70	25.9
	Unknown	4	1.5
Education n (%)	Basic: [0–9] years	19	7.0
	Secondary: [10–12] years	135	50.0
	Higher education	109	40.4
	Unknown	7	2.6
Working situation n (%)	Active workers	135	50.0
	Students	53	19.6
	Unemployed	62	23.0
	Others	2	0.7
	Unknown	18	6.7
Education or practice in the health sector n (%)		38	14.1
Self-reported socio-economic classificationn (%)	Low class	12	4.4
	Middle class	197	73.0
	High class	35	13.0
	Unknown	26	9.6
General health perception (1–5) (mean ± SD)		4.01 ± 0.77